Haru is the girl who likes Tsuna, and attends Midori Middle School, one of the toughest elite schools to get into in the area. She initially adored Reborn, but after she was saved by Tsuna, she diverted her adoration towards him instead. She loves children and is usually the one to babysit Lambo and I-Pin. She tends to use English words as for adjectives in her speech.

According to Tsuna and Gokudera, adult Haru has become more feminine, but her way of thinking is still the same.

She is also the Third person to take the Dying Will Shot in the series.